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LLM

The LLM is responsible for reading text and generating natural language responses to queries. By default, LlamaIndex.TS uses gpt-3.5-turbo.

The LLM can be explicitly set in the ServiceContext object.

import { OpenAI, serviceContextFromDefaults } from "llamaindex";

const openaiLLM = new OpenAI({ model: "gpt-3.5-turbo", temperature: 0 });

const serviceContext = serviceContextFromDefaults({ llm: openaiLLM });

Azure OpenAI

To use Azure OpenAI, you only need to set a few environment variables.

For example:

export AZURE_OPENAI_KEY="<YOUR KEY HERE>"
export AZURE_OPENAI_ENDPOINT="<YOUR ENDPOINT, see https://learn.microsoft.com/en-us/azure/ai-services/openai/quickstart?tabs=command-line%2Cpython&pivots=rest-api>"
export AZURE_OPENAI_DEPLOYMENT="gpt-4" # or some other deployment name

API Reference